Improvement in hinges



UNITED STATES PATENT OFFICE FREDERICK J. HATTORF, OF NEW HAVEN,CONNECTICUT.

IMPROVEMENT IN HINGES.

Specification forming part of Letters Patent No. 158,489, dated January5, 1875; application tiled y December 5, 1874.

To all whom it may concern:

Be it known that I, FREDERICK J. HAT- TCRF, of New Haven, in the countyof New Haven and State of Connecticut, have invented a new Improvementin Butt-Hinges; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, inv Figure l, a front view; Fig. 2, the reverse 5 Fig. 3, endview, the top removed; Fig. 4,

vertical section on line a: x, Fig. 5, transverse section on line z z,-Fig. 6, perspective view of one plate detached.

This invention relates to an improvement in that class of butt-hingeswhich are constructed so that the head ot the screws which secure thebutts will be hidden or covered. The usual construction has been toprovide a plate to cover the face of the leaves after the butt isattached. In such construction, if it is desired to remove the door, theplates covering must first be removed, and then the screws taken out.The object of this invention is to construct the butt so that the partof the hinge through which the screws are inserted is each detachablefrom the folding plates. The invention consists in a pair of plates tobe permanently attached, respectivcly, to the door and jamb, eachconstructed with a trunnion at each end and a iiange upon their outeredge, combined with a corresponding pair of jointed covering plates,connected to said permanent plates by links, which engage the pintle ofthe jointed plates and the trunnions of the permanent plates, as morefully hereinafter described.

A B are the jamb and door plates, one of which is shown in perspectivein Fig. 6. These plates are constructed with a ilange, C, upon theirouter edge. This flange is inclined upon its inside, or made to projectback over the plate, as seen in Figs. 3 and 5, and also to project ateach end, as seen in Fig. 6 5 and at each end, near the inner edge, atrunnion, a, 1s formed. These plates are perforated for the insertion ofscrews to secure them in place, substantially as the leaves ot' a commonbutt, as seen in Fig. 6. D D are the covering-plates, jointed togetherin the usual manner of butt-hinges, eachA plate .fitted to set onto itsstationary part A or-B, and take a bearing under the flange C. Thesecovering-plates are constructed with a flange, E, across each end, uponthe back side, as seen in Figs. 2 and 4, so that the ends of the covering-plate will come ush with the ends of the flange C, the trunnion aprojecting beyond the covering-plates. At each end of the center orknuckle part of the plates D two links, d d, are placed, one end of eachcorresponding in diameter to the center joint, and so that the pintlewill pass through and secure them in that position. The other end ofeach of these links is set over its trunnion on the end of plates A orB. Therefore, when the plates D are set onto the plates A and B, and thelinks d in place, the pintle through all the links and the joint, theparts are inseparable.

To attach the butts, set the plates A and B, respectively, in the jamband door, substantially as for common hinges; but' they mustl be set tothe depth of the ilange C; then withdraw the pintle from the joint untilthe links can pass over the trunnion; pass one of the plates D into itspermanent plate A or B, and the link over its trunnion then place theother in like manner, and replace the pintle, and the whole is secure,the heads. of the screws hidden, and the surface of butt which appearsshows nothing of the means of securing it.

To remove the door, withdraw the pintle and remove the links; then theplate D will be free.

I claim- The permanent plates A B, each constructed with the flange Cupon its outer edge, and with a trunnion, a, at each end, combined withthe jointed covering-plate D and links d d, substantially as described.

FREDERICK J. BATT-ORF.

Witnesses:

JOHN E. EARLE, C. V. FORBES.

